Can you achieve the same result with Thread context perhap?
Gary
-------- Original message --------
From: Chathura Priyankara <[email protected]>
Date: 05/18/2015 07:40 (GMT-08:00)
To: Log4J Developers List <[email protected]>
Subject: Re: [Dev][log4j2] How to create custom pattern layout in log4j2
Hi Ralph,
There are some custom information that I need to log. Please see the following
log4j properties.
log4j.appender.CONSOLE.layout=com.test.custom.PatternLayoutClass
log4j.appender.CONSOLE.layout.ConversionPattern=[%d] %P%5p {%c} - %x %m%n
log4j.appender.CONSOLE.layout.CustomPattern=%U%@%D[%T]
Here some custom Conversion characters such as U, D etc. are used. If the
conversion type is %P
for ConversionPattern then the log information of CustomPattern will print.
Can you please tell me how could I do the same thing with log4j2 ?
Thank you very much for the reply.
On Mon, May 18, 2015 at 6:25 PM, Ralph Goers <[email protected]> wrote:
You shouldn't need to do this. What is different about your layout than what
comes with Log4j? If you simply have a custom pattern or 2 then you would just
implement those as converters.
Ralph
On May 18, 2015, at 5:41 AM, Chathura Priyankara <[email protected]>
wrote:
I have to convert a pattern layout written for log4j 1.2. to log4j2. Following
code snippet shows a part of it. I have searched a lot about this but couldn't
find a proper guide.
Can anyone please give me a brief guide about how to do this conversion ?
Any help is highly appreciated!
public class CustomPatternLayout extends PatternLayout {
public static final String DEFAULT_PATTERN = "[%T][%S]";
private static String customPattern = DEFAULT_PATTERN;
public CustomPatternLayout(String pattern) {
super(pattern);
}
public synchronized void setCustomPattern(String customPattern) {
CustomPatternLayout.customPattern = customPattern;
}
private static class customPatternParser extends PatternParser {
protected void finalizeConverter(char c) {
PatternConverter pc = null;
switch (c) {
case 'P':
pc = new UserNamePatternConverter(formattingInfo,
extractPrecisionOption());
break;
.
.
.
default:
super.finalizeConverter(c);
}
if (pc != null) {
currentLiteral.setLength(0);
addConverter(pc);
}
}
private abstract static class CustomNamedPatternConverter extends
PatternConverter {
private int precision;
public CustomNamedPatternConverter(FormattingInfo formattingInfo, int
precision) {
super(formattingInfo);
this.precision = precision;
}
protected abstract String getFullyQualifiedName(LoggingEvent event);
public String convert(LoggingEvent event) {
String n = getFullyQualifiedName(event);
if (n == null) {
return "";
}
if (precision <= 0) {
return n;
} else {
int len = n.length();
int end = len - 1;
for (int i = precision; i > 0; i--) {
end = n.lastIndexOf('.', end - 1);
if (end == -1) {
return n;
}
}
return n.substring(end + 1, len);
}
}
}
private static class MyPatternConverter extends CustomNamedPatternConverter
{
public MyPatternConverter(FormattingInfo formattingInfo, int precision)
{
super(formattingInfo, precision);
}
public String getFullyQualifiedName(LoggingEvent event) {
int userId = //Get user Id
if ( . . .) {
return new CustomPatternLayout(customPattern).format(event);
}
return someOther;
}
}
}
}Thanks in advance.
--
Chathura Priyankara,
Faculty of Information Technology,
University of Moratuwa.
Blog : www.codeoncloud.blogspot.com
--
Chathura Priyankara,
Faculty of Information Technology,
University of Moratuwa.
Blog : www.codeoncloud.blogspot.com
